Question 1

An 05 star has an Hα line present in its spectra. What color is the line

Accepted Answer

A) red 
B) no color as the line is in the UV band 
C) blue 
D) no color as the line is in the infrared band 
A) red 
B) no color as the line is in the UV band 
C) blue 
D) no color as the line is in the infrared band

Question 2

An eclipsing binary has been analyzed and it has been determined that the ratio of the mass of star A to the mass of star B is 6 and the total mass of the two stars is 26 solar masses. What are the masses of star A and star B

Accepted Answer

A) Star A has a mass of 1 solar mass and star B has a mass of 6 solar masses. 
B) Star A has a mass of 20 solar mass and star B has a mass of 6 solar masses. 
C) Star A has a mass of 31.2 solar mass and star B has a mass of 5.2 solar masses. 
D) Star A has a mass of 22.3 solar mass and star B has a mass of 3.7 solar masses. 
E) The masses of star A and star B cannot be determined from the information given. 
A) Star A has a mass of 1 solar mass and star B has a mass of 6 solar masses. 
B) Star A has a mass of 20 solar mass and star B has a mass of 6 solar masses. 
C) Star A has a mass of 31.2 solar mass and star B has a mass of 5.2 solar masses. 
D) Star A has a mass of 22.3 solar mass and star B has a mass of 3.7 solar masses. 
E) The masses of star A and star B cannot be determined from the information given.

Question 3

In an H-R diagram, stars with the smallest radius are found in the _________ of the diagram.

Accepted Answer

A) center 
B) upper left corner 
C) upper right corner 
D) lower left corner 
E) lower right corner 
A) center 
B) upper left corner 
C) upper right corner 
D) lower left corner 
E) lower right corner

Question 4

The concept the picture above is trying to get across is _______.

Accepted Answer

A) intensity 
B) luminosity 
C) flux 
D) energy 
A) intensity 
B) luminosity 
C) flux 
D) energy

Question 5

If you hold out your thumb at arm's length and rapidly blink each eye closed in an alternating pattern, your thumb appears to move left and right. This exercise is an example of _____________.

Accepted Answer

The answer of If you hold out your thumb at...

Question 6

Which are the most common stars, massive stars or low-mass stars (relative to the Sun) High luminosity or low luminosity (relative to the Sun)

Accepted Answer

The most common type

Question 7

The star named Circini has the spectral type and luminosity class of O 8.5 V. Based on this information, which of the following are true I.Circini has a surface temperature less than the Sun.
II.Circini has a diameter that is greater than that of the Sun.
III.Circini is more luminous than the Sun.
IV.Circini is located near the upper left-hand corner in the H-R diagram.

Accepted Answer

A) I & II 
B) II & IV 
C) II, III, & IV 
D) I, II, & III 
E) I, II, III, & IV 
A) I & II 
B) II & IV 
C) II, III, & IV 
D) I, II, & III 
E) I, II, III, & IV

Question 8

An eclipsing binary will

Accepted Answer

A) be more luminous than a visual binary. 
B) also be observed as a spectroscopic binary. 
C) give off most of its light in the infrared. 
D) show a constant Doppler shift in its spectral lines. 
E) show two stars with variable proper motion. 
A) be more luminous than a visual binary. 
B) also be observed as a spectroscopic binary. 
C) give off most of its light in the infrared. 
D) show a constant Doppler shift in its spectral lines. 
E) show two stars with variable proper motion.

Question 9

Reorder the spectral sequence to include the L and T dwarfs. What is the new sequence

Accepted Answer

The answer of Reorder the spectral sequence to include the...

Question 10

Five stars and their spectral types are given below. Which star would have the lowest surface temperature

Accepted Answer

A) α For; F8 
B) ο Cet; M7 
C) 35 Ari; B3 
D) γ Tri; A0 
E) ξ Per; O7 
A) α For; F8 
B) ο Cet; M7 
C) 35 Ari; B3 
D) γ Tri; A0 
E) ξ Per; O7

Question 11

The larger variation in brightness in an eclipsing system consisting of a white dwarf and an M3 main-sequence star occurs when the white dwarf passes behind the M3 star.

Accepted Answer

A) True 
 B)False

Question 12

Why do molecular bands only occur in the spectra of the coolest stars

Accepted Answer

Because molecules in cool star

Question 13

The most common stars are

Accepted Answer

A) supergiants. 
B) giants. 
C) upper (more luminous) main-sequence stars. 
D) white dwarfs. 
E) lower (less luminous) main-sequence stars. 
A) supergiants. 
B) giants. 
C) upper (more luminous) main-sequence stars. 
D) white dwarfs. 
E) lower (less luminous) main-sequence stars.

Question 14

The parallax of the star 75 Leo is 0.10 and its apparent visual magnitude is +5.18. The absolute visual magnitude of 75 Leo is ____________________.

Accepted Answer

The answer of The parallax of the star 75 Leo...

Question 15

As shown in the spectra above, sodium is present in _________ spectral classes.

Accepted Answer

A) M0 
B) K0 
C) G1 
D) All of the other choices are correct. 
A) M0 
B) K0 
C) G1 
D) All of the other choices are correct.

Question 16

White dwarfs are dense, cool, and dim.

Accepted Answer

A) True 
 B)False

Question 17

What measurements are needed to determine the orbital motion of a spectroscopic binary star

Accepted Answer

Measure the spectra of the bin

Question 18

Of the three units of astronomical distances, _________ is shorter than _________, which is shorter than _________.

Accepted Answer

The answer of Of the three units of astronomical distances,...

Question 19

When we see a binary system producing eclipses, we know that the orbit is nearly edge-on.

Accepted Answer

A) True 
 B)False

Question 20

Which one of the methods below enables astronomers to measure the distance of a star near the Sun in our galaxy

Accepted Answer

A) sound echoes knowing the speed of sound and time 
B) parallax using Earth's orbit 
C) human binocular vision 
D) Balmer series 
E) none of the above 
A) sound echoes knowing the speed of sound and time 
B) parallax using Earth's orbit 
C) human binocular vision 
D) Balmer series 
E) none of the above

An 05 star has an Hα line present in its spectra. What color is the line

An eclipsing binary has been analyzed and it has been determined that the ratio of the mass of star A to the mass of star B is 6 and the total mass of the two stars is 26 solar masses. What are the masses of star A and star B

In an H-R diagram, stars with the smallest radius are found in the _________ of the diagram.

The concept the picture above is trying to get across is _______.

If you hold out your thumb at arm's length and rapidly blink each eye closed in an alternating pattern, your thumb appears to move left and right. This exercise is an example of _____________.

Which are the most common stars, massive stars or low-mass stars (relative to the Sun) High luminosity or low luminosity (relative to the Sun)

An eclipsing binary will

Reorder the spectral sequence to include the L and T dwarfs. What is the new sequence

Five stars and their spectral types are given below. Which star would have the lowest surface temperature

The larger variation in brightness in an eclipsing system consisting of a white dwarf and an M3 main-sequence star occurs when the white dwarf passes behind the M3 star.

Why do molecular bands only occur in the spectra of the coolest stars

The most common stars are

The parallax of the star 75 Leo is 0.10 and its apparent visual magnitude is +5.18. The absolute visual magnitude of 75 Leo is ____________________.

As shown in the spectra above, sodium is present in _________ spectral classes.

White dwarfs are dense, cool, and dim.

What measurements are needed to determine the orbital motion of a spectroscopic binary star

Of the three units of astronomical distances, _____ is shorter than _, which is shorter than _____.

When we see a binary system producing eclipses, we know that the orbit is nearly edge-on.

Which one of the methods below enables astronomers to measure the distance of a star near the Sun in our galaxy

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

The Origin of the Solar System

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters

Exam 8: The Family of Stars

An 05 star has an Hα line present in its spectra. What color is the line

An eclipsing binary has been analyzed and it has been determined that the ratio of the mass of star A to the mass of star B is 6 and the total mass of the two stars is 26 solar masses. What are the masses of star A and star B

In an H-R diagram, stars with the smallest radius are found in the _________ of the diagram.

The concept the picture above is trying to get across is _______.

If you hold out your thumb at arm's length and rapidly blink each eye closed in an alternating pattern, your thumb appears to move left and right. This exercise is an example of _____________.

Which are the most common stars, massive stars or low-mass stars (relative to the Sun) High luminosity or low luminosity (relative to the Sun)

An eclipsing binary will

Reorder the spectral sequence to include the L and T dwarfs. What is the new sequence

Five stars and their spectral types are given below. Which star would have the lowest surface temperature

The larger variation in brightness in an eclipsing system consisting of a white dwarf and an M3 main-sequence star occurs when the white dwarf passes behind the M3 star.

Why do molecular bands only occur in the spectra of the coolest stars

The most common stars are

The parallax of the star 75 Leo is 0.10 and its apparent visual magnitude is +5.18. The absolute visual magnitude of 75 Leo is ____________________.

As shown in the spectra above, sodium is present in _________ spectral classes.

White dwarfs are dense, cool, and dim.

What measurements are needed to determine the orbital motion of a spectroscopic binary star

Of the three units of astronomical distances, _________ is shorter than _________, which is shorter than _________.

When we see a binary system producing eclipses, we know that the orbit is nearly edge-on.

Which one of the methods below enables astronomers to measure the distance of a star near the Sun in our galaxy

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

The Origin of the Solar System

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters

Of the three units of astronomical distances, _____ is shorter than _, which is shorter than _____.